fog. SO2 and NOx come mainly from power stations and factories burning fossil fuels, or from motor vehicles. · Carbon dioxide in the air can dissolve in rain water to form carbonic acid, H 2CO3 CO2 + H2O H2CO3 · During the last century the rain water in some parts of the world has become far more acidic. This acid rain has been caused by the emission of pollutants gasses such as sulfuric dioxide, when goal is burned in electric power stations, sulfur impurities form sulfur dioxide S + O2 SO2 · The gas is also produced when fuels obtained crude oil are burned. When sulfur dioxide is released into the air it reacts with water and oxygen to form sulfuric acid, which is strong it ionizes completely to hydrogen ions. H2SO4 2H + SO4-2 Effects pH range Effect 6.59 No effect 6.06
· High construction costs because of radiation and complicated procedures and long construction time (Buzz, 2009) · Accident risks for example Chernobyl, Ukraine in 1986 or Fukushima, Japan in 2011 and radiation can cause serious health problems · Nuclear weapons may cause tension between different countries · Uranium is hard to get and expensive to mine, refine, and transport, and produce considerable environmental waste (including greenhouse gasses) during all of these procedures (Buzz, 2009) · Wastes lasts from 200 to 500 thousand years (Buzz, 2009) · Shipping nuclear waste internationally increases the potential threat to terrorism (Buzz, 2009) · Nuclear weapons may cause tension between different countries ("Cons of nuclear," ) Conclusion I am not a supporter of nuclear energy, mainly because of the disasters that have happened throughout the years
The disasters are getting more serious and they are mostly caused by global warming which people can affect. What should be done to make the situation better? Nowadays people have put material things above the beauty and survival of the Earth. Money and power are more important than, for example, the wonder of cool, fresh and clean spring water. The water has been polluted and the trees cut down, also the air is polluted with gasses. All of these things are dangerous for animals as they live in the forests. People do not care about the nature and they are not aware of the risks. Although these figures are depressing, things have improved recently. Scientists are aware that the Earth is getting warmer and they are trying to make things better, also more information is given out so that people can be ready for serious disasters. One good thing is
are planned. Additionally, historically and culturally importants sites can be flooded and lost. *Dams can be vulnerable to bombardment during wartime, sabotage and terrorism. I would like to conclude by saying that the hydro energy is the simplest and most known renewable energy there is. It is perfect for balancing the energy system and for supplying power at peak times of the day. And it does not create greenhouse gasses. Thank you for listening. If you have any questions then you may ask them.
available for other compatible uses such as farming). The authors acknowledge that many practical barriers would need to be overcome to reach this theoretical capacity. Advantages Wind energy is fueled by the wind, so it's a clean fuel source. Wind energy doesn't pollute the air like power plants that rely on combustion of fossil fuels, such as coal or natural gas. Wind turbines don't produce atmospheric emissions that cause acid rain or greenhouse gasses. Wind energy is a domestic source of energy, produced in the United States. The nation's wind supply is abundant. Wind energy relies on the renewable power of the wind, which can't be used up. Wind is actually a form of solar energy; winds are caused by the heating of the atmosphere by the sun, the rotation of the earth, and the earth's surface irregularities. Wind energy is one of the lowest-priced renewable energy technologies available today, costing
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